Raheja Ecotech Engineers

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Forced Circulation Evaporators

In a Forced Circulation Evaporator, the circulating product is heated when it flows through the heat exchanger and then partially evaporated when the pressure is reduced in the flash vessel (separator). The liquid product is typically heated only a few degrees for each pass through the heat exchanger. To maintain a good heat transfer within the heat exchanger it is necessary to have a high recirculation flow rate.
Advantages of Forced Circulation Evaporators:
Forced recirculation evaporator can be run for 40-50 days without any scaling, whereas falling film evaporator can only be run for 20 hrs only. 4 hours are required to clean the falling film evaporator daily.
Operation and Maintenance Cost reduction due to lower usage of chemicals, steam and power consumption required during preventive maintenance and cleaning.
The design capacity of the plant is lesser with respect to falling film evaporator.
Despite of having high power consumption in forced recirculation evaporator, processing cost per lit of distillery effluent is less than falling film evaporator.
Useful for concentration of inversely soluble material or for material which is susceptible to scaling or crystallizing like distillery effluent, mango/tomato juice, Malt concentrate (70% TDS).
Effluent Treatment Plants
Malt mix slurry
Tomato paste
Mango pulp paste
Sugar Syrup
Black liquor
Distillery effluent
High Concentration Requirements

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